Hoisting equipment



June 30-, 1942. w. J. HILL 2,288,354

HOISTING EQUIPMENT Filed June 27, 1939 3 Sheets-Sheet l gwu /wto'a WILL/AM d. H/LL June 1942; w. J. HlLL 2,288,354

HOISTING EQUIPMENT Filed June 27, 1939 s Sheets-Sheet 2 W/u/AM J. HILL June 30, 1942. HEL 2,288,354

HOISTING EQUIPMENT Filed June 27, 1939 5 Sheets-Sheet 3 ml 912 M grwa/wto'n Patented June 30, 1942 UNITED STATES PATENT OFFICE HOISTIN G EQUIPMENT William J. Hill, Houston, Tex.

Application June 27, 1939, Serial No. 281,335

9 Claims.

This invention relates to hoisting equipment.

An object of the invention is to provide hoisting equipment of the character described specially designed for elevating and automatically releasing loads.

The invention has been particularly designed for use in the building industry for delivering building materials to the elevated platform on which the workmen are located.

Another object of the invention is to provide novel means for releasing the load after it has been elevated and landed on the platform.

The invention also embodies a novel type of mast anchored to the workmens platform in a novel manner and which may be quickly and securely mounted in place or demounted.

With the above and other objects in view the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawings, wherein:

Figure 1 shows a side elevation of the mast mounted on the platform and shown partly in section.

Figure 2 shows a fragmentary, elevational view taken at right angles to the view shown in Figure 1.

Figure 3 shows a cross-sectional view taken on the line 3--3 of Figure 1.

Figure 4 shows a cross-sectional view taken on the line 4-4 of Figure 1.

Figure 5 shows a fragmentary, side elevation of the mast showing the boom mounted thereon.

Figure 6 shows a plan view of the boom.

Figure 7 shows a fragmentary, side elevation of the supporting leg of the work platform showing an anchor pipe bearing secured thereto,

Figure 8 shows a horizontal, sectional View thereof.

Figure 9 shows a side elevation of a novel type of hitch employed shown in active position.

Figure 10 shows a fragmentary, front elevation thereof.

Figure 11 shows a side view thereof in released position.

Figure 12 shows an elevational view of the complete hoisting equipment mounted on the platform.

Referring now more particularly to the drawings wherein like numerals of reference designate the same parts in each of the figures, the numerals I, 2 designate the supporting legs of the framework of a workmens platform 3 on which the workmen stand during the erection of the building and onto which the building materials are hoisted to a convenient location for the workmen.

The numeral 4 designates an upright supporting mast preferably formed of pipe. The upper end of the mast 4 has an enlarged sleeve 5 fitted thereover and welded thereto as more accurately shown in Figure 5 and forming a vertical bearing. Fastened to the lower end of the mast 4 there is a collar 6 having the diverging arms I, I. Secured to the outer ends of these arms are the hooks 8, 8. U-shaped clamps 9, 9 are fitted about the outer legs I of the supporting structure for the platform. One arm of each clamp terminates in an inwardly directed tang II] which penetrates into the material of the corresponding leg and the other arm of each clamp 9 is formed with a bearing II, said bearings being in alignment and being provided to receive an anchor pipe I3 over which the hooks 8 engage.

It will be noted that the hooks 8 have depending extensions So as more clearly shown in Figures 1 to 12 to provide a long bearing surface so that if the hooks 8 are not positioned to engage the anchor pipe I3 said bearing surfaces will rest against said pipe. Spaced above the collar 6 and disposed around the mast 4 there is a rectangular frame composed of the side members I4, I4 and the end members I5, I5 suitably anchored together, as by welding and, at one end, the side members I4 are extended forming the extensions I6, I6 whose free ends have the downwardly turned tangs Ilia, IBa terminating in sharp points which penetrate into the upper side of the adjacent margin of the platform 3.

Pivoted to the respective side members I4, I4 are the levers l7, l1. Qne end I8, of each lever, is downwardly turned underneath the platform and terminates in an upwardly directed sharp tang I80. which penetrates into the underside of said margin of the platform as clearly shown in Figures 1 and 12. .The other ends of the levers Il are pivoted to the lower ends of the straps I9, I9. The upper ends of these straps may be riveted together and are adjustably connected to one end of the link 20. The other end of this link is adjustably connected to the lug 2I outstanding from the mast 4. A toggle joint is thus formed between the straps I9 and the link 20. The toggle joint may be moved outwardly in the direction shown by the arrow in Figure 1 thus exerting an upward pull on the corresponding ends of the levers I! and releasing the tangs I8a from the platform so that the mast may be dismounted when desired. When the mast is mounted in the desired position the toggle joint may be moved inwardly toward the mast until it passes center thus exerting a downward thrust against the outer end of the levers I1 and causing the tangs I6a, Illa to penetrate into the material of the platform.

Truss rods 22, 22 and 23, 23 are secured at their lower ends to the collar 6, said rods being secured also to the rectangular framework at the corner thereof and their upper ends being secured to the bearing sleeve 5 shown in Figures 1, 2 and 12. lhese parts are preferably secured together by Welding, the hooks 8 and the tangs lfia, lSa thus securing the mast firmly to the platform and in upright position.

As more clearly shown in Figures 5 and 6 a transverse boom 23 is mounted on the mast 4 and is composed of the side members 2 1, 24 preferably formed of channel iron and anchored in spaced relation by the cross-bars 25, 25 welded thereto and further reinforced and strengthened by the truss structure 26. This boom has a depending spindle 27 which is fitted snugly into the bearing sleeve 5 whereby the boom may rotate about a vertical axis. Mounted between the side members of the boom are the end sheaves 28, 29 mounted to rotate on horizontal axes.

A cable 30 is fastened at one end to the cable anchor 3| at one end of the boom. Said cable is threaded through the sheave of a traveling block 32 and then passes over the sheaves 28 and 29 with its other end accessible to the workmen on the platform as illustrated more clearly in Figure 12. As shown in Figure 12 there is a novel type of hitch depending from the traveling block 32. This hitch comprises side links 33, 33 whose upper ends are pivoted to the lower end of the frame of the traveling block. A stop arm 3% has one end fitted between and Welded to said links and its other end extending outwardly therefrom. One end of the Weight 35 is pivoted between the lower ends of said links and is limited in its upward movement by the stop arm 3 The pivoted end of the weight 35 has the oppositely directed supporting hooks 35, 37 with either of which the bail 38 of the bucket 3%] may be engaged. If the ball is engaged with the hook 36 upon the landing of the bucket on the platform 3 when the cable is released and given slack the weight 35 will drop down into the position shown in Figure 11 and the hook 3'3 will automatically release the bail. If it is not intended to release the bail when the bucket is landed on the platform the bail should be engaged by the hook ill and it will remain so engaged until manually released.

The drawings and description are illustrative merely, while the broad principle of the invention will be defined by the appended claims.

What I claim is:

1. Hoisting equipment comprising a mast, inter-pivoted gripping members carried by said mast intermediate its end portions to releasably engage a horizontally disposed supporting platform having vertically positioned legs therebeneath, and hook members carried by arms extending transversely from the lower extremity of said mast to engage a bar releasably and vertically adjustably carried by said vertical legs below said gripping members.

2. Hoisting equipment comprising a mast, gripping means on the mast engageable with and releasable from a substantially horizontal supporting platform disposed in transverse spaced relation to the axis of said mast to maintain the mast in a predetermined fixed upright position for supporting the mast and hooks on the lower extremity of the mast engageable with a supporting anchor disposed in spaced relation to the axis of said mast below said platform, and a hoisting boom rotatable about a vertical axis and carried by the mast.

3. Hoisting equipment comprising a mast, a frame disposed about the mast intermediate its ends, guy rods about the frame and anchored thereto and whose upper and lower ends are anchored to the mast, grappling means including arms extending outwardly from one side of said frame adapted to rest on a supporting platform and moveable arms pivoted to said frame engageable with and releasable from a supporting platform.

4. Hoisting equipment comprising a mast, a frame disposed transversely of and about the mast intermediate its ends, guy rods about the frame and anchored thereto and whose upper and lower ends are anchored to the mast, grappling means on the frame engageable with and releasable from a supporting scaffold platform and anchor hooks on the lower end of the mast adapted to engage a support carried by vertically disposed scaffold members.

5. Hoisting equipment comprising a mast, means engageable with horizontally and vertically disposed supporting scaffold structures for supporting the mast in a fixed upright position, a boom mounted on top of the mast to revolve about a vertical axis, end sheaves on the boom, a cable operable over the sheaves and a load carrying traveling block operable by the cable.

6. Hoisting equipment comprising a mast, a boom rotatably mounted on the upper end of said mast and means including a scissor-shaped clamp having one of its members rigidly secured to said mast and its other member pivoted to said rigid member and movable relative to said mast for removably connecting the mast to a horizontal member of a construction scaiiolding which is spaced transversely thereto as said rigidly secured scissor member engages the top side and the pivoted scissor member engages the bottom side of said horizontal scaifolding member.

'7. Hoisting equipment comprising a mast, a boom movably carried by said mast, means positioned to one side of axis of said mast for releasably and adjustably connecting said mast to vertical timber supports of a construction scaffolding, and supporting and bracing means carried transversely of the mast and pivotally adjustable relative thereto to clampingly engage a horizontal member of said construction scaffolding above said first named means.

8. Hoisting equipment comprising a mast, a boom connected to one end of the mast, means for releasably connecting the mast to a timber scaffold, said means comprising diverging legs connected to the other end of the mast, means for releasably hanging said legs on the scaffolding, a brace member connected to the mast between said legs and the boom, a clamp connected to said brace member adapted to clamp on a member of the scaffolding.

9. Hoist equipment comprising a mast, a frame secured to said mast transversely thereto and intermediate its ends, arms extending outwardly at one side of said frame to rest on a horizontal scaffold member, pivoted arms adapted to clampingly engage the under side of said horizontal scaffold member, and anchor hooks carried by said mast below said frame for engagement with bearings vertically adjustable on vertical scaffold members.

WILLIAM J. HILL. 

